When you first see the NASA footage of what appears to be two XBOX 360s flying through Earth's atmosphere, it's pretty unnerving—they're not lens flares or weather balloons, and they don't have traditional solar sails or antennas like normal satellites. However, this is a video whose title and description are filled with confused word salad: "Nasa Sat feed catches two objects, ufo? Cruising from north pole! Closeup! 2014 simulation?why? Great res very clear. Has windows? What is this?"

The video was posted in 2014, but it recently caused a stir in UFO circles when the video was apparently rediscovered, with some declaring it the "best footage ever" of UFOs. Unfortunately for UFO enthusiasts, it was quickly revealed that the weird, box-shaped objects weren't alien spacecraft at all—they were NASA's two GRACE satellites, whose names stand for "Gravity Recovery and Climate Experiment." Scott Brando, a UFO debunker, gets credit for revealing the truth.

"GRACE consists of two identical spacecraft that fly about 220 kilometers (137 miles) apart in a polar orbit 500 kilometers (310 miles) above Earth. GRACE maps Earth's gravity field by making accurate measurements of the distance between the two satellites, using GPS and a microwave ranging system. It is providing scientists from all over the world with an efficient and cost-effective way to map Earth's gravity field with unprecedented accuracy. The results from this mission are yielding crucial information about the distribution and flow of mass within Earth and its surroundings."

For reference, here's a video that shows a simulation of the two satellites flying around together (skip to 1:48):